Olabisi Onabanjo University, Ago Iwoye is a state (owned and operated) university in Ago Iwoye, Ogun State, Nigeria. The university was founded July 7, 1982 as Ogun State University (OSU) and was renamed Olabisi Onabanjo University on May 29, 2001 in honour of Chief (Dr.) Olabisi Onabanjo, whose efforts as the then civilian governor of Ogun State gave birth to the university. Meanwhile, many students still refer to the institution as OSU, an acronym for the former name.
The university has had a total output of 10,291 graduates and 1,697 postgraduates. Olabisi Onabanjo University has multiple campuses. The Main Campus in Ago Iwoye is popularly called Permanent Site (PS) by the students and a Mini Campus which was the home of the Faculty of Science till it was moved to the permanent site in January 2013. Faculty of Agriculture is in Aiyetoro, faculty of Engineering is in Ibogun, college of Medicine is in Shagamu, faculty of Pharmacy and department Biochemistry is at Ikenne. Students and alumni of the Olabisi Onabanjo University are addressed as ‘Great OOUITES.’ information and activities amidst Students are communicated through the school's portal as well as notable privately owned magazines such as ' Inside OOU magazine', ' OOU Vanguard' and a few others.